molony



D. P. MOLONY.

CARBURETOR.

APPLICATION FILED JULY 1711918.

1,404,21 5 Patented Jan. 24, 1922.

2 SHEETS-SHEET l- DJP. MOLONY.

CARBURETOR. v APPucATm men JULY 11. Haw.

1,404,215. Patented Jan. 24, 1922.

2 SHEETS-SHEET 2- UNITED STATES PATENT OFFICE.

DONALD P. MOLONY, 0F FLINT, MICHIGAN, ASSIGNOR TO MARVEL CARBURETER COMPANY, OF FLINT, MICHIGAN, A CORPORATION OF INDIANA.

CARBURETOR.

To all whom it may concern:

Be it known that I, DONALD P. MoLoNY, a citizen of the United States, residing at F lint in the county of Genesee andv State of Michigan, have invented certain new and useful Improvements in Carburetors, of which the following is a specification, reference being had therein to the accompanying drawing.

This invention relates to certain new and useful improvements in carburetors; the object being to provide a carburetor which is so constructed that high and low grades of petroleum distillates such as gasoline and kerosene can be used in order to produce a high grade explosive mixture.

Another object of my invention is to provide a carburetor having a mixing chamber provided with a normally open air inlet and a normally closed air inlet, each air inlet having a fuel nozzle disposed therein, the fuel nozzle of the normally closed air inlet being connected to a source of kerosene supply so that after the engine has been started on gasoline delivered from the jet of the normally open air passage and has reached a predetermined speed, the kerosene jet will be brought into operation so as to proportionately mix the kerosene and gasoline.

Another and further object of the invention is to provide a carburetor which is so constructed and controlled from the dash of the motor vehicle to which it is attached, that the kerosene supply can be cut off and gasoline supplied to the jet so that both jets will supply gasoline to the mixing chamber.

Other and further objects and advantages of the invention will be hereinafter set forth and the novel features thereof defined by the appended claims.

In the drawings:

Figure 1 is a top plan view of my improved construction of carburetor;

Figure 2 is a vertical section;

Figure 3 is an inverted plan view; and

Figure 4 is a diagram in vertical section showing the dash controlling means.

Like numerals of reference refer to like parts in the several figures of the drawing.

In the drawing I have shown a Model E Marvel type carburetor, comprising a casing 1 having a mixing chamber 2, and throttle chamber 3 surrounded by a heating chamber 1, the upper end of the throttle chamber be- Specification of Letters Patent. Pate t d J 24 1922 Application filed July 17, 1918.

Serial No. 245,31 1.

ing adapted to be connected to the induction pipe of an internal combustion engine.

The casing 1 is provided with a lateral valve controlled air inlet 5 and an open bottom 1n which an insert 6 is arranged carried by a base 7, said insert being provided w th a Venturi tube 8 surrounded by a heat acket 9. The insert 6 carries a suction controlled valve 10 which is engaged by a spring 11 the tension of which is adjusted by a screw 12 whereby the mixing chamber of the carburetor is provided with a normally open air passage and a normally closed air passage.

Mounted on the base 7 is a float and fuel chamber 13 to which is adapted to be connected a feed pipe 14 extending from the gasoline supply reservoir, not shown. The base 1s provided with a fuel passage 15 communicating with the fuel reservoir 13 through which fuel is adapted to pass into the nozzle 16, which terminates in the Venturi tube 8 whereby gasoline will be fed to the nozzle and drawn therefrom by the air passing through the Venturi tube in the ordinary manner so as to produce an explosive mixture within the mixing chamber 2. The nozzle 16 is provided with a valve for controlling the passage of fuel therethrough.

The end of the fuel passage 15 is closed by a valve 17 which is provided with bores 18 and 19 forming passages through which fuel is adapted to pass to. a nozzle 20, extending up into the normally closed air passage adjacent the suction control valve.

The base 7 is provided with a bore 21, the upper end of which is closed by the valve 17 and the lower end communicates with the supply pipe 22 extending from a fuel and float chamber 23 mountedon the base 7 to which is connected a supply pipe 24 extending from a reservoir adapted to contain kerosene.

In Fig. 2 of the drawing I have shown the valve 17 turned into such a position that gasoline will be supplied to the high and low speed nozzles 20 and 16 of the carburetor in order to allow the carburetor to operate in the ordinary manner.

In Fig. 1 I have shown the valve 17 turned into such a position that the supply of gasoline to the high speed nozzle 20 is cut off and the float and fuel chamber 23 containing kerosene will be supplied to the carburetor.

The valve 17 is provided with a dash control 25 whereby the operator of the motor vehicle can shift the same so as to use all gasoline in the carburetor or gasoline and kerosene.

From the foregoing description it will be seen that I have provided a carburetor with a mixing chamber having a normally closed a-ir passage provided with a nozzle for supplying a high grade petroleum distillate and a normally closed air passage provided with a nozzle for supplying a low grade petroleum distillate which is automatically ln-ought into operation after the engine reaches a predetermined speed whereby an explosive mixture is produced from high ant low grade petroleum distillates. By constructing a carburetor in this'manner a very economical carburetor is produced which has all out the advantages of a carburetor using only a high grade petroleum distillate, as in starting and runnig slow a high grade petroleum distillate is used, and as the speed of the motor is increased the low grade petroleum distillate is used in connection with the high grade, and I have found in practice that a very satisfactory explosive mixture can be produced.

In the operation of a carburetor as herein shown and described, in starting the motor to which the carburetor is attached, gasoline is drawn out of the low speed nozzle and delivered into the mixing chamber so as to produce a high grade explosive mixture, and as the speed of the motor to which the carburetor is attached increases, the suction controlled valve is opened and kerosene and air are deliveredto the mixing chamber so as to mix with the gasoline and air entering the mixing chamber so as to produce a mixture of kerosene and air which will produce a high grade explosive mixture at less cost than a carburetor employing high and low speed jets supplied with gasoline.

I claim:

1. A carburetor having a mixing chamber provided with air inlets, a. nozzle arranged in each of said air inlets, a suction controlled valve for normally closing one of said air inlets, means for supplying one fuel to both of said nozzles, and means for supplying another fuel to the nozzle in the normally closed air inlet.

2. A carburetor having a mixing chamber provided with air inlets, one of said air inlets being normally closed by a swinging suction controlled valve, a nozzle disposed in the normally open air inlet, a nozzle disposed in the normally closed air 'inletter-minating adjacent the free end of said suction controlled valve, means for supplying one fuel to both of said nozzles, and means for supplying another fuel to the nozzle in the normally closed air inlet.

A combined gasoline and kerosene carburetor provided with multiple jets, one of said jets being arranged adjacent a suction controlled valve, means for supplying gasoline to the multiple jets and means for completely cutting off the supply of gasoline to the jet arranged adjacent the suction controlled valve and for supplying kerosene to said jet. 7

In testimony whereof I hereunto aiiix 'my signature in the presence of two witnesses.

I DONALD P. MOLONY.

lVitnesses J. RICHARD FRANCIS, CHARLOTTE M. JoNEs 

